CN201588818U - Air guide cover body structure for fan - Google Patents

Abstract

An air guide cover body structure for a fan, comprising: the front air guiding shell is provided with an air outlet at the front end; a plurality of front net brackets provided at an air outlet of the front wind guide housing, wherein the front net brackets include: a plurality of support brackets having a small width; and a plurality of wind guide brackets which are arranged between the supporting brackets at equal intervals and have a width larger than that of the supporting brackets. The utility model discloses a wind-guiding cover body structure for fan has the advantage that the preparation is simple and convenient and low-cost, just the air current can be assembled and guided with the water conservancy diversion structure of support and support for the wind-guiding to the support, makes the air current blow off roughly parallelly along water conservancy diversion structure direction to the air-out distance of extension air current, and reduce the air current noise.

Description

Windshield structure for fans

technical field

The utility model relates to an air guide cover structure, in particular to an air guide cover structure used in a fan and capable of improving the wind outlet effect.

Background technique

1 shows an electric fan on the general market. The electric fan 10 at least includes: a front fan guard 101, a rear fan guard 102, an impeller 103 with blades 1031 and a rotating shaft 1032, and a motor 104 for driving the impeller, and The main structure of the front fan guard 101 and the rear fan guard 102 is only composed of a plurality of thin metal wires. The traditional electric fan 10 uses the motor 104 to drive the impeller 103, and the purpose of setting the front and rear fan guards 101, 102 is to avoid the danger caused by touching the rotating fan blade 1031, and the airflow is formed by the rotation of the fan blade 1031, from The outside of the rear fan guard 102 draws the airflow and pushes it toward the front fan guard 101 to produce it. Although the airflow is blown out parallel to the front of the electric fan 10, the front fan guard 101 and the rear fan guard 102 have the following appearance structures. Many gaps are used for airflow to pass through, but they are still easily disturbed by the surrounding air. Therefore, the airflow is caused to spread around and the wind force is scattered, so that the wind force must be felt within a certain distance from the electric fan 10 .

In addition, in order to increase the wind power of the electric fan, the traditional method is to increase the speed of the fan blades. However, increasing the speed of the fan blades will cause the electric fan to generate high noise and cause high power consumption. It is in line with the current trend of advocating environmental protection and energy saving. Run in the opposite direction.

In order to solve the problem of insufficient wind power of traditional electric fans, there are attempts to improve general electric fans. As shown in FIG. Two helical pieces 2013 and two round frames 2011; rear fan guard (not shown in the figure); impeller (not shown in the figure), which has a fan blade (not shown in the figure) and a rotating shaft (not shown in the figure); A motor (not shown in the figure), which is used to drive the impeller, wherein the first helical blades 2012 are evenly distributed in the front fan guard 201, and each of the second helical blades 2013 is equally spaced It is arranged between each of the first helical pieces 2012 , but the second helical pieces 2013 are not distributed on the inner circle of the front fan guard 201 . The fan 20 uses the motor to drive the rotating shaft on the impeller to rotate the blades, thereby generating airflow, which passes through the multiple first helical pieces 2012, multiple second helical pieces 2013 and two round frames 2011 of the front fan guard 201. Designed to push the airflow in a direction more parallel to the fan shaft than conventional electric fans. However, although the airflow produced by the fan 20 can push the airflow more parallelly than the general electric fan, the airflow force and air guide efficiency of the airflow it pushes are not enough, in addition, the noise produced is also higher than the general traditional The electric fan is large, so it is not suitable for use in noise-sensitive places (for example: the space where audio equipment is used, etc.). There are high expectations for air-convective air guide structures for fans.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an air guide cover structure for a fan, which can prolong the air outlet distance of the air flow and reduce the air flow noise.

In order to achieve the above and other purposes, the utility model provides an air guide cover structure for a fan, comprising: a front air guide shell with an air outlet at its front end; The air outlet, wherein, the front net support includes: a plurality of supports for support, their widths are smaller; Bracket for support.

In the air guiding cover structure for a fan, the front air guiding shell may be in the shape of an annular cylinder, and the number of the air guiding brackets may be three.

In the wind guide cover structure for the fan, the front net support can be a spiral structure or a straight line structure extending outward from the middle to the wall of the air outlet, and the spiral front net support The helical extension direction may be opposite to the rotation direction of the fan blade.

According to the structure described above, the width ratio of the support bracket and the wind guide bracket can be 1:2 to 1:6, and the front side edge of the wind guide bracket and the support bracket of the front net bracket can be on the same plane, and the width direction of the front grid support may be parallel to the axis direction of the front wind guide shell.

Still in the wind guide cover structure for fans, the front net support may have at least one ring frame with the center of the front net support as the center, and the ring frame may be connected to the front net support, And the front side edge of the ring frame and the front side edge of the front net support can be on the same plane.

In summary, the wind guide cover structure for fans of the present invention has the advantages of simple manufacture and low cost, and the air diversion design of the support bracket and the wind guide bracket can be used to concentrate the air near the fan blades. , and adjust the air intake direction of the air extracted by the fan blades, and then converge and guide the flow direction of the air flow out, so that the air flow is blown out roughly parallel to the direction of the air guide structure, thereby extending the air outlet distance of the air flow and reducing the air flow noise.

Description of drawings

Figure 1 shows a known fan structure.

Fig. 2 shows another known fan structure.

Fig. 3A to Fig. 3C are the schematic diagrams of the first embodiment of the wind guide cover structure for the fan of the present utility model, wherein Fig. 3A is an example applied to a fan, Fig. 3B is a front view, and Fig. 3C is a rear view A partial enlargement of the .

Fig. 4A to Fig. 4C show the schematic view of the second embodiment of the wind guide cover structure for the fan of the present utility model, wherein, Fig. 4A is the example applied to the fan, Fig. 4B is the front view, and Fig. 4C is the rear view A partial enlargement of the .

[Description of main component symbols]

10, 20 electric fan

101, 201 front fan screen

102 rear fan guard

103, 403, 503 impellers

104 motor

1031 fan blade

1032 shaft

2011 round frame

2012 First Spiral

2013 Second Helix

402, 502 rear cover body

40, 50 fans

401, 501 front cover body

4012, 5012 front net bracket

40121, 50121 support bracket

40122, 50122 bracket for air guide

40123, 50123 ring frame

4011, 5011 front air guide shell

40111, 50111 front ring cylindrical shell

40112, 50112 rear ring cylindrical shell

Detailed ways

The implementation of the present utility model is described below through specific examples, and those skilled in the art can easily understand the advantages and effects of the present utility model from the content disclosed in this specification. The utility model can also be implemented in other different ways, that is, various modifications and changes can be made without departing from the technical idea disclosed in the utility model.

Fig. 3A to Fig. 3C are the schematic diagrams of the first embodiment of the wind guide cover structure for the fan of the present utility model, wherein Fig. 3A is an example applied to a fan, Fig. 3B is a front view, and Fig. 3C is a rear view A partial enlargement of the .

As shown in Fig. 3A, the fan 40 using the wind guide cover structure for the fan of the present utility model includes: a front cover 401, a rear cover 402 and an impeller 403 with multiple fan blades, wherein the impeller 403 Located inside the front cover 401 and the rear cover 402 .

Fig. 3 B and Fig. 3 C represent the front cover body 401 that has linear front mesh support 4012, and a plurality of front mesh supports 4012 are arranged on the air outlet of described front wind guiding shell 4011, and described front mesh support 4012 comprises at least: a plurality of supporting The brackets 40121 are smaller in width; the brackets 40122 for wind guiding are arranged at equal intervals between the supporting brackets 40121 and wider than the supporting brackets 40121 . In addition, in order to keep each component support of the front net support 4012 stable, so as to exert its rectification and diversion effect, the front net support 4012 has at least one ring frame 40123 with the center of the front net support 4012 as the center of the circle. The ring frame 40123 is connected to the support bracket 40121 and the wind guide bracket 40122, and the front side edge of the ring frame 40123 is on the same plane as the front side edge of the support bracket 40121 and the wind guide bracket 40122, so as to fix Bracket 40122 for air guide and bracket 40121 for support. Through the width difference between the smaller support bracket 40121 and the wider wind guide bracket 40122 in the front net bracket 4012, the airflow formed by the rotating impeller 403 can be controlled by the larger width wind guide bracket 40122. The flow is diverted and rectified, and the air flow that flows roughly parallel to the axial direction of the air guiding shell is blown out. In addition, the width direction of the front net support 4012 is parallel to the axis of the front wind guide shell 4011, and the front side edge of the front net support 4012 and the front side edge of the support bracket 40121 are on the same plane, so that the wind guide The rear side edge of the bracket 40122 protrudes backward (ie toward the direction of the impeller 403 ) compared with the supporting bracket 40121 to produce a wind guiding effect. The width ratio of the support bracket 40121 and the wind guide bracket 40122 is adjusted to 1:2 to 1:6, wherein the ratio of 1:3 is better, and the support bracket 40121 and the wind guide bracket 40122 are both In terms of the total quantity used, the air guide bracket 40122 should not be less than 2, and 3 is better, and 6 is more preferable, but the upper limit should not exceed 16; and the supporting bracket 40121 has no special limit on the number, At least not less than 2, and the brackets 40122 for air guide are arranged at equal intervals between the brackets 40121 for support. The composition and quantity of the supporting bracket 40121 and the air guide bracket 40122 of the front net bracket 4012 will be adjusted with the size of the fan, that is, the size of the fan increases, and the composition and quantity of the brackets 40121 and 40122 also increase accordingly . That is to say, by adjusting the width ratio and quantity ratio of the air guiding bracket 40122 and the supporting bracket 40121 , the generation of noise can be reduced and the air outlet distance of the airflow can be increased to further improve the convective effect of the air circulation.

In addition, the front wind guide shell 4011 is a multi-section annular cylindrical casing composed of at least one hollow cylinder with different diameters, wherein the openings at both ends of the annular cylindrical casing have different diameters. Specifically, the front air guiding shell 4011 can be composed of a front ring cylindrical shell 40111 with a smaller diameter and a rear ring cylindrical shell 40112 with a larger diameter. One end of the annular cylindrical shell 40111 is opened as an air outlet, that is, the diameter of the air outlet is consistent with the diameter of the front ring cylindrical shell 40111, and the diameter of the front ring cylindrical shell 40111 is slightly larger than that of the front ring The rear stage of the cylindrical case 40111 is engaged with the cylindrical case 40112 . Therefore, the hollow cylinder of the front air guide shell 4011 can further guide the airflow for multiple rectification and diversion, so that the airflow flows from the air outlet of the front cover 401 in a direction parallel to the axis of the front air guide shell 4011, and then Extend the distance the airflow leaves the wind.

Fig. 4A to Fig. 4C are the schematic diagrams of the second embodiment of the wind guide cover structure for the fan of the present invention, wherein, Fig. 4A is an example applied to a fan, Fig. 4B is a front view, and Fig. 4C is a rear view A partial enlargement of the .

As shown in FIG. 4A , the fan 50 using the air guide cover structure for fans of the present invention includes: a front cover 501 , a rear cover 502 and an impeller 503 with multiple blades. Wherein, the impeller 503 is located inside the front cover 501 and the rear cover 502 .

Figures 4B to 4C show a front cover 501 with a helical front net bracket 5012, a plurality of front net brackets 5012 are arranged at the air outlet of the front wind guide shell 5011, and the front net bracket 5012 in this example at least includes: A plurality of support brackets 50121 are smaller in width; wind guide brackets 50122 are arranged at equal intervals between the support brackets 50121 and wider than the support brackets 50121 . In addition, in order to keep each component support of the front net support 5012 of the present utility model stable, so as to bring into play its rectification and diversion effect, the front net support 5012 has at least one ring frame that is roughly the center of the front net support 5012 50123, and the ring frame 50123 is connected to the support bracket 50121 and the wind guide bracket 50122, and the front side edge of the ring frame 50123 is on the same plane as the front side edge of the support bracket 50121 and the wind guide bracket 50122 Above, to fix the bracket 50122 for the wind guide and the bracket 50121 for the support. Through the width difference between the smaller width support bracket 50121 and the larger width air guide bracket 50122 in the front net bracket 5012, the airflow formed by the rotating impeller 503 driving the fan blades can be driven by the larger width wind guide bracket. The bracket 50122 is guided and rectified to blow out an airflow that flows substantially parallel to the axial direction of the front air guiding shell 5011 .

In addition, the helical extension direction of the front net support 5012 is opposite to the rotation direction of the fan blades, and the width direction of the front net support 5012 is parallel to the axis of the front wind guide shell 5011, and the wind guide bracket 50122 of the front net support 5012 is aligned with the support. The front side edge of the bracket 50121 is on the same plane, so that the rear side edge of the wind guiding bracket 50122 protrudes backward (that is, toward the direction of the impeller 503) compared with the supporting bracket 50121 to produce a wind guiding effect, and the supporting bracket The width ratio of 50121 and the bracket 50122 for air guide is adjusted to 1:2 to 1:6, and the ratio of 1:3 is better, and the bracket 50121 for support and the bracket 50122 for air guide are used In terms of the total quantity, the number of brackets 50122 for air guidance shall not be less than 2 pieces, preferably 3 pieces, and 6 pieces are more preferable, but the upper limit shall not exceed 16 pieces; while the number of support pieces 50121 is not particularly limited, at least no less As for the two pieces, it should be noted that the air guide brackets 50122 must be equidistantly arranged between the supporting brackets 50121 . The composition and quantity of the front net support 5012 will be adjusted according to the size of the fan, that is, the size of the fan increases, and the composition and quantity of the front net support 5012 also increase accordingly. That is to say, by adjusting the width ratio and quantity ratio of the air guiding bracket 50122 and the supporting bracket 50121, the generation of noise can be reduced and the air outlet distance of the airflow can be increased to further improve the convective effect of the air circulation.

In addition, the front wind guide shell 5011 is an annular cylindrical casing composed of at least one hollow cylinder with different diameters, wherein the diameters of the openings at both ends of the annular cylindrical casing are different. Specifically, the front air guiding shell 5011 can be composed of a front ring cylindrical shell 50111 with a smaller diameter and a rear ring cylindrical shell 50112 with a larger diameter. One end of the annular cylindrical shell 50111 is opened as an air outlet, that is, the diameter of the air outlet is consistent with the diameter of the front ring cylindrical shell 50111, and the diameter of the front ring cylindrical shell 50111 is slightly larger than that of the front ring. The rear section of the cylindrical housing is engaged with the cylindrical housing 50112 . Therefore, the hollow cylinder of the front air guide shell 5011 can further guide the airflow for multiple rectification and diversion, so that the airflow flows from the air outlet of the front cover 501 in a direction parallel to the axis of the front air guide shell 5011, thereby extending The distance the airflow leaves the wind.

In addition, in order to improve the stability of operation and reduce the noise generated during the operation of the rotating power device, the fan blades should be kept at a certain distance from the front cover, and the setting of the fan blades should not completely overlap with the front cover, that is to say, Set the shortest distance from the front edge of the fan blade close to the front cover to the outer edge of the front cover to 5mm to 50mm, but preferably 8mm to 25mm, by lengthening the distance from the fan blade to the outer edge of the front net support , It also helps to reduce the noise generated during operation.

It can be known from the above examples that the function principle of the front air guide shell is to isolate the airflow generated by the fan blades from the air in the surrounding environment, leaving only the air outlet for the airflow to go straight forward, and using a specific width and number of air guide brackets With the supporting bracket, the fan structure of the utility model can have a good airflow rectification and flow diversion effect, thereby increasing the airflow distance and increasing air convection, so as to avoid the airflow being disturbed by the surrounding air prematurely and being scattered and reducing the wind speed .

Test case:

First of all, under the same size and specification, take two 10-inch fans and install the linear front net support and the spiral front net support respectively. and fan DUT B, and take a 10-inch known electric fan as fan DUT C. Turn the above three fans to be tested A, B, and C, and test the air volume near the tested objects A, B, and C, as well as the noise and wind speed at different distances. The test results are shown in the following table:

From the measurement results in the above table, it can be seen that compared with the general electric fan, the fan with the air guide cover structure for the fan of the present invention can indeed achieve the effect of reducing airflow noise and pushing the airflow to a longer distance, thus It can be seen that the installation of the fan with the wind guide cover structure for the fan of the utility model makes the air intake direction of the air extracted by the fan blade converge and guide the airflow through the design of the composition, width and quantity of the front net support The direction of flow, so that the airflow blown out can reduce the airflow noise better than ordinary electric fans, and can push the airflow to a longer distance.

The above-mentioned embodiments are only used to illustrate the principle and effect of the present utility model, but not to limit the present utility model. The scope of protection of the utility model shall be determined according to the contents of the claims of the utility model.

Claims (10)

1. a wind scooper body structure that is used for fan is characterized in that, comprising:

Preceding ventilation case, its front end has exhaust outlet; Net support before a plurality of, they are arranged on the exhaust outlet of described preceding ventilation case, and wherein, described preceding net support comprises: a plurality of support supports, their width is less; A plurality of wind-guiding supports, they be arranged on equally spacedly described support with between the support and its width greater than described support support.

2. the wind scooper body structure that is used for fan as claimed in claim 1 is characterized in that, described preceding ventilation case is a cylinder shape.

3. the wind scooper body structure that is used for fan as claimed in claim 1 is characterized in that, described wind-guiding is 3 with the quantity of support.

4. the wind scooper body structure that is used for fan as claimed in claim 1 is characterized in that, helical structure or the straight line shape structure of described preceding net support for extend out to the exhaust outlet wall from the centre.

5. the wind scooper body structure that is used for fan as claimed in claim 1 is characterized in that, described support is 1: 2 to 1: 6 with support and described wind-guiding with the width ratio of support.

6. the wind scooper body structure that is used for fan as claimed in claim 1 is characterized in that, described before the net support wind-guiding with support with support at grade with the cephalolateral margin of support.

7. the wind scooper body structure that is used for fan as claimed in claim 2 is characterized in that, the width direction of described preceding net support is parallel with the axis direction of preceding ventilation case.

8. the wind scooper body structure that is used for fan as claimed in claim 1 is characterized in that, the center that described preceding net support has at least one former net support is the annulus frame in the center of circle.

9. the wind scooper body structure that is used for fan as claimed in claim 8 is characterized in that, described annulus frame is connected in described preceding net support, and the cephalolateral margin of the cephalolateral margin of described annulus frame and described preceding net support at grade.

10. the wind scooper body structure that is used for fan as claimed in claim 4 is characterized in that, the spiral extension direction of described spiral helicine preceding net support is opposite with the sense of rotation of flabellum.

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